:root {
  color-scheme: light;
  --ink: #123047;
  --slate: #304e63;
  --muted: #6f8796;
  --line: #d8e5e8;
  --mist: #eff6f6;
  --teal: #0f766e;
  --teal-soft: rgba(15, 118, 110, 0.08);
  --paper: #ffffff;
  --shadow: 0 18px 48px rgba(18, 48, 71, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 7rem;
}

body {
  margin: 0;
  background:
    linear-gradient(104deg, transparent 0 64%, rgba(18, 48, 71, 0.040) 64% 82%, transparent 82% 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0) 0 5.7rem, rgba(18, 48, 71, 0.025) 5.7rem 5.76rem, rgba(255, 255, 255, 0) 5.76rem 100%),
    radial-gradient(ellipse at 18% 10%, rgba(220, 232, 232, 0.54), transparent 36rem),
    linear-gradient(180deg, #fbfaf6 0%, #ffffff 34%, #f8fbfb 100%);
  background-size: auto, 100% 11.5rem, auto, auto;
  background-attachment: fixed;
  color: var(--slate);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

body::selection {
  background: rgba(15, 118, 110, 0.18);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
}

ul,
ol {
  margin: 0;
  padding: 0;
}

.skip-link {
  left: 1rem;
  padding: 0.75rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 100;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 1rem;
}

.shell {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(216, 229, 232, 0.85);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  color: var(--ink);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.15;
  white-space: nowrap;
}

.brand span {
  color: var(--muted);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  flex: 1;
  justify-content: center;
  gap: 1.35rem;
  color: rgba(48, 78, 99, 0.78);
  font-size: 0.94rem;
  white-space: nowrap;
}

.desktop-nav a:hover {
  color: var(--ink);
}

.header-cta,
.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  font-size: 0.92rem;
  font-weight: 700;
}

.header-cta:hover,
.button.secondary:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.mobile-nav {
  display: none;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.8rem;
  color: rgba(48, 78, 99, 0.82);
  font-size: 0.9rem;
}

.mobile-nav a {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 0.42rem 0.75rem;
}

.hero {
  padding: 4.5rem 0 5.5rem;
}

.hero-frame {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) 340px;
  gap: 3rem;
  align-items: end;
  border: 1px solid rgba(216, 229, 232, 0.75);
  border-radius: 32px;
  background:
    linear-gradient(90deg, rgba(18, 48, 71, 0.035) 0 1px, transparent 1px 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(246, 250, 249, 0.82)),
    rgba(255, 255, 255, 0.9);
  background-size: 7.5rem 100%, auto, auto;
  box-shadow: var(--shadow);
  padding: 4rem 3.5rem;
}

.hero-frame::after {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: 46%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.10), transparent),
    linear-gradient(132deg, rgba(15, 118, 110, 0.11), rgba(15, 118, 110, 0.035) 42%, transparent 72%);
  pointer-events: none;
}

.hero-copy,
.glance-panel {
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.rule {
  width: 4rem;
  height: 1px;
  margin-top: 1rem;
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.72), transparent);
}

h1 {
  max-width: 780px;
  margin-top: 1.35rem;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(2.7rem, 7vw, 4.75rem);
  line-height: 1.02;
}

.hero-subtitle {
  max-width: 720px;
  margin-top: 1.5rem;
  color: rgba(48, 78, 99, 0.88);
  font-size: 1.32rem;
  line-height: 1.55;
}

.hero-text {
  max-width: 650px;
  margin-top: 1.35rem;
  color: rgba(48, 78, 99, 0.78);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button.primary {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}

.button.primary:hover {
  border-color: var(--teal);
  background: var(--teal);
}

.button.secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
}

.glance-panel,
.panel,
.person-card,
.schedule-card,
.date-card,
.submission-box,
.callout {
  border: 1px solid rgba(216, 229, 232, 0.9);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
}

.glance-panel {
  overflow: hidden;
  padding: 2rem;
}

.glance-panel dl {
  display: grid;
  gap: 1.15rem;
  margin: 1.3rem 0 0;
}

.glance-panel dt,
.date-card span {
  color: rgba(48, 78, 99, 0.58);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.glance-panel dd {
  margin: 0.3rem 0 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.45;
}

.section {
  padding: 6rem 0;
}

.section-tint {
  border-top: 1px solid rgba(216, 229, 232, 0.72);
  border-bottom: 1px solid rgba(216, 229, 232, 0.72);
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.028) 0 1px, transparent 1px 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.70), rgba(241, 247, 247, 0.50)),
    rgba(248, 251, 250, 0.72);
  background-size: 8rem 100%, auto, auto;
}

.section-heading {
  max-width: 760px;
}

.section-heading h2 {
  margin-top: 1.25rem;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.18;
}

.section-heading p:not(.eyebrow) {
  max-width: 680px;
  margin-top: 1.25rem;
  color: rgba(48, 78, 99, 0.82);
  font-size: 1.05rem;
}

.speaker-grid,
.organizer-grid,
.dates-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.panel {
  padding: 2rem;
}

.panel h3,
.topic-panel h3,
.schedule-card h3,
.submission-box h3 {
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.55rem;
  line-height: 1.25;
}

.panel p {
  margin-top: 1rem;
  color: rgba(48, 78, 99, 0.82);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.topic-panel ol {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.6rem;
  list-style: none;
  counter-reset: topic;
}

.topic-panel li {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.75rem;
  align-items: start;
  border: 1px solid rgba(216, 229, 232, 0.78);
  border-radius: 16px;
  background: rgba(239, 246, 246, 0.28);
  padding: 0.85rem 1rem;
}

.topic-panel li::before {
  counter-increment: topic;
  content: counter(topic, decimal-leading-zero);
  color: var(--teal);
  font-weight: 700;
}

.speaker-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.organizer-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: stretch;
}

.person-card {
  display: flex;
  flex-direction: column;
  padding: 1.35rem;
}

.person-card h3 {
  margin-top: 1rem;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.28;
}

.person-card h3 a {
  text-decoration: underline;
  text-decoration-color: rgba(15, 118, 110, 0.24);
  text-underline-offset: 0.22em;
}

.person-card h3 a:hover {
  color: var(--teal);
  text-decoration-color: rgba(15, 118, 110, 0.62);
}

.person-card p:not(.eyebrow) {
  margin-top: 0.65rem;
  color: rgba(48, 78, 99, 0.78);
  font-size: 0.92rem;
  line-height: 1.5;
}

.person-card span {
  display: inline-flex;
  max-width: 100%;
  margin-top: 1rem;
  border: 1px solid rgba(216, 229, 232, 0.9);
  border-radius: 999px;
  background: rgba(239, 246, 246, 0.5);
  padding: 0.35rem 0.65rem;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.35;
}

.person-card.compact {
  padding: 1.05rem;
  background: linear-gradient(180deg, rgba(239, 246, 246, 0.34), rgba(255, 255, 255, 0.96));
}

.person-card.compact h3 {
  margin-top: 0.75rem;
  font-size: 1.08rem;
}

.person-card.compact p:not(.eyebrow) {
  margin-top: 0.45rem;
  font-size: 0.86rem;
  line-height: 1.42;
}

.organizer-photo {
  width: 5.25rem;
  height: 5.25rem;
  border: 1px solid rgba(216, 229, 232, 0.9);
  border-radius: 19px;
  background: var(--mist);
  box-shadow: 0 8px 20px rgba(18, 48, 71, 0.08);
  object-fit: cover;
  object-position: center top;
}

.speaker-photo {
  width: 5.25rem;
  height: 5.25rem;
  border: 1px solid rgba(216, 229, 232, 0.9);
  border-radius: 19px;
  background: var(--mist);
  box-shadow: 0 8px 20px rgba(18, 48, 71, 0.08);
  object-fit: cover;
  object-position: center 18%;
}

.avatar {
  display: grid;
  width: 4.2rem;
  height: 4.2rem;
  place-items: center;
  border: 1px solid rgba(216, 229, 232, 0.9);
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.12), rgba(255, 255, 255, 0.95)),
    var(--mist);
  color: var(--ink);
  font-weight: 800;
}

.schedule-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.schedule-card {
  padding: 2rem;
}

.schedule-item {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1rem;
  border-top: 1px solid rgba(216, 229, 232, 0.86);
  padding: 1rem 0;
}

.schedule-item:first-of-type {
  margin-top: 1.4rem;
}

.schedule-item time {
  color: var(--teal);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.schedule-item p {
  color: var(--ink);
  font-weight: 700;
  line-height: 1.45;
}

.callout {
  padding: 3rem;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(255, 255, 255, 0.96)),
    #fff;
}

.cfp-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 2rem;
  align-items: start;
  margin-top: 2.5rem;
}

.cfp-grid h3 {
  color: var(--ink);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.5rem;
}

.check-list {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.3rem;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.55rem;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--teal);
}

.check-list a {
  color: var(--teal);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(15, 118, 110, 0.26);
  text-underline-offset: 0.18em;
}

.check-list a:hover {
  color: var(--ink);
  text-decoration-color: rgba(18, 48, 71, 0.42);
}

.submission-box {
  padding: 1.5rem;
}

.submission-box p:not(.eyebrow) {
  margin: 1rem 0 1.35rem;
}

.dates-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.date-card {
  padding: 1.45rem;
}

.date-card strong {
  display: block;
  margin-top: 0.8rem;
  color: var(--ink);
  font-size: 1.02rem;
  line-height: 1.45;
}

.site-footer {
  border-top: 1px solid rgba(216, 229, 232, 0.86);
  background: #fff;
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  color: rgba(48, 78, 99, 0.78);
  font-size: 0.92rem;
}

.footer-title {
  color: var(--ink);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 1.18rem;
}

@media (max-width: 1040px) {
  .desktop-nav {
    display: none;
  }

  .mobile-nav {
    display: flex;
  }

  .hero-frame {
    grid-template-columns: 1fr;
    padding: 3rem 2rem;
  }

  .glance-panel {
    max-width: 520px;
  }

  .topic-grid,
  .schedule-list,
  .cfp-grid {
    grid-template-columns: 1fr;
  }

  .speaker-grid,
  .organizer-grid,
  .dates-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 32px, 1120px);
  }

  .header-inner {
    min-height: 4rem;
  }

  .header-cta {
    padding-inline: 1rem;
  }

  .hero {
    padding: 2.8rem 0 4rem;
  }

  .hero-frame {
    border-radius: 24px;
    padding: 2rem 1.25rem;
  }

  h1 {
    font-size: 2.55rem;
  }

  .hero-subtitle {
    font-size: 1.08rem;
  }

  .section {
    padding: 4.5rem 0;
  }

  .speaker-grid,
  .organizer-grid,
  .dates-grid {
    grid-template-columns: 1fr;
  }

  .schedule-item {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .callout {
    padding: 2rem 1.25rem;
  }

  .footer-inner {
    flex-direction: column;
  }
}